If your income limits are too high this year to make a Roth IRA contribution, there is a simple way to solve this problem. First make a non-deductible IRA contribution. Within a few days of making that contribution, convert your non-deductible IRA to a Roth IRA, because there are no income limitations on making Roth conversions.
This back-door approach works well if you have only non-deductible IRA money. If you have other types of IRAs, such as deductible IRA money or rollover money in an IRA from a 401k or 403b, then converting non-deductible IRA money to a Roth gets messier. That’s the time to consult with a tax advisor first.